Calista C3-S Security System Amplifier

A device which increases the amplitude (level) of an electrical signal (making it louder).

Balance
1) The relative level of two or more instruments in a mix, or the relative level of audio signals in the channels of a stereo recording. 2) To make the relative levels of audio signals in the channels of a stereo recording even.

Calista C1-9 Home Theater Instrument Out Direct
Feeding the output of an electric instrument (like an electric guitar) to the recording console or tape recorder without using a microphone.

Lead
The musical instrument that plays the melody of the tune, including the vocal.

Calista C2-88 Projector Clipping
Distortion of a signal by its being chopped off. An overload problem caused by pushing an amplifier beyond its capabilities. The flat-topped signal has high levels of harmonic distortion which creates heat in a loudspeaker and is the major cause of loudspeaker component failure.

Gain
1) Knob usually found at the top of each input channel on the soundboard. Used to set input levels of the separate channels to relatively equal positions.
2) The amount of increase in audio signal strength, often expressed in dB.

Keying Input (Key Input)
An input on a dynamics processing device to control the device by an external audio signal. Bose

Active Crossover
Uses active devices (transistors, IC's, tubes) and some form of power supply to operate.

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